Question

50,5•x=60,5
4/5-2/5=
12/14•7/20=

Answer 1

50,5•x=60,5

х = 60,5/50,5

х = 605/505

х = 121/101

х = 1 целая 20/101

4/5 - 2/5 =

= (4-2)/5 =

= 2/5 = 0,4

12/14 • 7/20 =

= 6/7 * 7/20 =

= 6/20 = 3/10 = 0,3